Improvement in screens



L. FITZPAT'RICK.

SCREEN.

Patented Nov. 30,1875.

W'TN'EEEEE'I N PETERS, FHOT O-L|THOGRAFHER, WASH NGTON D C UNITED STATESPATENT OFFIoEz.

LUKE FITZPATRICK, OF' WHEELING, WEST VIRGINIA.

IMPROVEMENT IN SCREENS.

Specification forming part of Letters Patent No. 170,440, dated November30, 1875; application filed July 14, 1875.

- ing machine, showing-my improved screen D attached to the rear of thefurnace G. Fig. 2 represents a flat screen in a square or oblong form.It is a mere variation or modification of the cylinder-screen D inFig. 1. Fig. 3 is an end view of the flat screen.

The object and use of my invention are to produce a screen in which themeshes or openings can be varied to suit any sized substance that may berequired to be cleaned of impurities or foreign particles, or where onepart is to be separated from the other, as in screening coal. Toaccomplish this object I construct the screen of such material, size,and shape as best suitable for the purpose for which it is to be used.

'In'the screen D, Fig. 1, the slats or ribs 1 1 .1 are pivoted to thering or frame E E, as

'shown, so that, by moving the side pieces together or apart, the spacesbetween the slats will be reduced or enlarged to the required width tosuit the different kinds of substances to be screened. J is a brace,pivoted at one end and having a slot at the other end, provided with aset-screw to permit the slats being adjusted as desired. 0 is ascreen,slightly concave, being another modification of my screen, placed at themouth of a bluing-furnace, Fig. 1.

' My screen is peculiarly adapted to the cleaning of nails of allimpurities while going through the process of bluing. It (screen 0) isso arranged to the motive power that it receives-a traverse or shakingmotion.

Themanner of using the cylinder-screen D is this: Motion is imparted tothe several working'parts. The nails to be screened and blued are placedon the screen 0, which cleans from them a large portion of theimpurities, such as scales, slivers, headless nails, &c. They then passthrough the bluing-furnace G into the cylinder-screen D, Where they arecleaned completely of all foreign particles, the

dirt, scales, ac, falling into the receptacle H, and the clean andperfect nails into receptacle K, Fig. 1.

When different-sized nails are to be screened the ring E is turned tothe right or left sufficient to close or open the spaces between theslats, as desired, and thenthe whole is secured in position by theset-screw in the band or brace J.

Having described my invention, what I claim, and desire to secure byLetters Patent,

A cylinder-screen, D, composed of adjustable slats I I I pivoted to endrings E E, and

secured by band or brace J, substantially as shown, and for the purposesherein set forth.

LUKE FITZPATRIOK.

Witnesses:

O. BATES HOWARD, WILLIAM H. BRowN.

